TABLE 1.
General characteristics of patients who received noninvasive continuous positive airway pressure (CPAP) outside the intensive care unit
| Patients | 537 |
| Age years | 69 (60–76) |
| Male | 391 (73) |
| BMI kg·m−2 | 28 (25–31) |
| White blood cell count ×103 cells·μL−1 | 6.9 (5.1–9.5) |
| Lymphocyte count ×103 cells·μL−1 | 0.8 (0.6–1.1) |
| Creatinine mg·dL−1 | 1.0 (0.8–1.3) |
| Aspartate-aminotransferase U·L−1 | 41 (29–59) |
| Alanine-aminotransferase U·L−1 | 31 (22–50) |
| C-reactive protein mg·dL−1 | 11 (6–17) |
| Ferritin ng·mL−1 | 1053 (565–1643) |
| Lactate dehydrogenase U·L−1 | 560 (410–786) |
| D-dimer μgFEU·L−1 | 954 (526–1874) |
| Charlson Comorbidity Index | 1 (0–2) |
| Chronic arterial hypertension | 278 (52) |
| Diabetes | 138 (26) |
| Ischaemic heart disease | 66 (12) |
| CPAP days | 4 (1–8) |
| Hospital length of stay days | 16 (9–27) |
Data are presented as n, median (interquartile range) or n (%). BMI: body mass index; FEU: fibrinogen-equivalent unit.